Here's my little local development only script I use to download and install WordPress. mac, osx, mamp

GetWP

#!/bin/bash

##########
## Setup: hardcode your mysql user/pass. Yeah, yeah, I know...it's frowned upon.
##        but for local development, I have no problem with it.
##        Find and replace: MYSQLUSER / MYSQLPASS
##
## Usage: This script accepts only one variable, the site name. 
## 
#########

# Create working folder
mkdir /tmp/getWP
cd /tmp/getWP

## Download latest (stable) version of WordPress
curl -O http://wordpress.org/latest.tar.gz

## Uncompress
tar -xf latest.tar.gz
cd /tmp/getWP/wordpress/

## Edit wp-config
mv wp-config-sample.php wp-config.php
sed -i .bak "s/username_here/MYSQLUSER/g" wp-config.php
sed -i .bak "s/password_here/MYSQLPASS/g" wp-config.php
sed -i .bak "s/database_name_here/$1/g" wp-config.php

## Create Database
CMD="create database $1"
/Applications/MAMP/Library/bin/mysql --host=localhost -uMYSQLUSER -pMYSQLPASS -e "$CMD"

## Move working folder to ~/Sites
mv /tmp/getWP/wordpress ~/Sites/$1

## Open in Firefox
open -a Firefox http://local